Velocity governor



July 22, 1947. R. REGER VELOCITY GOVERNOR Filed May 15, 1942 INVENTOR.KflfNO/YD K565i.

Patented July 22, 1947 VELOCITY GOVERNOR Raymond Roger, Anderson, Ind.,assignor to Pierce Governor Company, Anderson, Ind, a

corporation Application May 15, 1942, Serial No. 443,113

13 Claims.

This invention relates to a velocity governor and one which is composedof extremely few parts and compactly arranged, andone wherein the basicfeatures of the invention may be incorporated as an insert fordetachable inclusion between the carburetor and engine manifold or onewherein the construction can be built into a carburetor body or amanifold intake body. For purposes of convenience this invention isillustrated and described as applied to an insert arrangement.

The chief object of this invention is to provide in a velocity governorof an engine an arrangement of but few parts and these of simple andrugged construction, which will properly function so that the governingaction is progressively increased at greater velocities and near theclosed throttle position.

Another object of this invention is to provide a construction whereinsuch a compact and simple construction effects a performance beyond thatheretofore obtained by more complicated structures in that closerregulation over the eff eotive range of operation is obtained.

One feature of the invention consists in associating a velocity operablecam with a pivoted member including a cam contacting follower forextending both ends of a spring that is the opposing force on thethrottle valve of the governor and so varying this force that theaforesaidextensible performance is obtained.

Other features of the invention consist in the adjustment of the springforce.

A corollary of the first feature is that the arrangement is such that asmooth cam may be utilized and such a cam can be more easily calibrated.

Other objects and features of the invention will be set forth more fullyhereinafter.

The full nature of the invention will be understood from theaccompanying drawings and the following specification and claims:

In the drawings,

Fig. 1 is a top plan view of one embodiment of the invention, showingthe governor valve in the wide open position.

Fig. 2 is a side elevational View of the lower portion of a downdraftcarburetor and the upper portion of an engine intake manifold with thegovernor throttle body interposed therebetween and with the mechanismexternal of the throttle body illustrated in elevation, the heavy dashlines indicating the wide open position of the throttle valve and thelighter dotted lines indicating the closed position.

Fig.3 is a diagrammatic elevational view of the valve, cam, follower,pivoted member and opposing spring, the parts being shown inapproximately half open position of the valve, the latter being showndotted.

Fig. 4 is a similar view of the same parts in the closed valve position,dotted lines indicating the initial or open valve position.

Fig. 5 is a diagrammatical elevational view similar to Figs; Sand {1,and of a'modified form of the invention and showing the parts in theinitially valve closing position.

Fig. 6 is a sectional view taken on line 6-5 of Fig. 5 and in thedirection of the arrows.

In the drawings It indicates anengine intake manifold having a flange 12for connection to the flange l3 of a carburetor, thelower portion ofwhich is illustrated in Fig. 2 and indicated by the numeral M. Thenumeral l5 indicates the passage in the carburetor. The throttle valveof the carburetor and its fuel supplying, et cetera, portions areomitted. The intake manifold has the passage l6 therein.

A throttle body indicated by the numeral I1 is provided with the boresi8 extending therethrough and the bolts 20 retained by nuts l9 serve toconnect the carburetor and manifold together with the throttle body I!therebetween, the 'connections being suitably sealed as by gaskets 2!.The throttle body has the passage 22 extending therethrough thatregisters with the passages 15 and I6.

Extending across the passage 22 is a valve shaft 23. This shaft has aprojecting end 24 and carried by said shaft within the passage 22 is theelliptical valve 25. This valve 25, it will be observed is slightlylonger on the upstream side than the downstream side. It will be notedthe axis of the shaft 23 is slightly offset from the longitudinal centerof the passage 22.

The normally wide open position of this throttie valve is approximately5 from the vertical and in the direction of closing, as shown in Figs. 1and 2. The valve when closed is positioned approximately 3 to thehorizontal plane through the axis of the valve shaft 23. Hence, as thevelocity of the fuel mixture in the intake to the en increases as thespeed of the engine increases end that for which the governor isadjusted to operate, such fuel mixture tends to close the 'valve movingit from the position shown in Fig.

1 to the position shown in Fig. 3 and then tothe position shown in Fig.l, at which time the governor valve has completely out off the fuelsupply to the engine. It will be obviousthat as the velocity varies inthe intake, the governor valve position will fluctuate. Broadly, all ofthe aforesaid is old in the velocity governor art.

Reference now will be had to the first form of the invention and it willbe observed that the shaft 23 has a non-circular end 26, the remainderbeing threaded as at 24 and the nuts 2! and 28 serve to retain on saidshaft the cam member 29 having a corresponding aperture 34 therein forreception by the portion 23 of the shaft 23.

This cam 29 is apertured as at 3| to mount one end 32 of a tensionspring 33, herein shown coiled in character. The face of the cam hereinis shown provided with a slight recess 34, a portion 35 concentric withthe axis of the valve shaft 23 and a portion 36. This portion 36 is agradual extension of the portion 35 and each part of the portion 33 isprogressively more remote from the valve shaft axis than the portionimmediately ad- .l'acent thereto and closer to the concentric portion35.

Projecting from the throttle body i7 is a boss 31 and mounted therein isa pin or stationary shaft 38 grooved as at 39 to receive a split lockingring 44 that retains on said shaft 38 a member 44 that is apertured asat 42 for shaft reception. The member 4| extends downwardly and adjacentthe cam 29 is provided with a pin or shaft 43 upon which is rotatablymounted a roller 44 retained by a washer 45. If desired as shown in Fig.2, there may be interposed between the roller 44 and the pin 43 ananti-friction structure in the form of balls and the like, 46. Theroller 45 rides the cam surface 34-35-36.

Extending downwardly and outwardly away from the cam is a tail portion4! upon the member 4|. Herein the same is provided with three spacedapertures 48. The spring 33 has itsopposite end 49 mounted in one ofthese apertures.

The governor, therefore, includes an oficenter valve, a cam rigidtherewith, a pivoted member carrying a follower portion that engages thecam and a tension spring interposed between the cam and the member andnormally constraining the follower portion into cam contact at alltimes. Increasing velocity of the fuel mixture through the intake servesto rotate the cam clockwise-see Figs. 2, 3 and 4, and in such clock wiserotation, the following occurs:

In the initial rotation the cam follower riding the concentric portionof the cam does not cause any movement of the pivoted member 4|.However, as the cam moves from the position shown in Fig. 2 to theposition shown in Fig. 3, the spring is extended, the extension takingplace through the pull only upon the end 32. As the valve continues toclose, due to increased speed or velocity of the fuel mixture throughthe intake, the cam further rotates clockwise and in such rotation theeccentric portion of the cam (36) causes the pivoted member 4| to rotatecounterclockwise from the position shown in Figs. 2 and 3 to theposition shown in Fig. 4 by the full'lines, the rest position beingindicated by the dotted lines. Naturally, the greater the amount ofvalve movement from half throttle to closed throttle that occurs, thegreater will be the movement of the member 4| and thus the spring 33will be extended from both ends and in an increasing amount because ofthe movement of the cam aperture 3| downwardly and to the left and themovement of the member tail portion 41 outwardly or to the right.

It will be understood of course that the cam may be of any desiredshape; In view of the working off of both ends of the spring, it will beunderstood that for governor operation through conventional ranges withthis invention, it is possible to use an opposing spring ofcomparatively lighter value than that which has heretofore beenrequired. For example, for an engine, Chevrolet 1940, a spring of butthree to five pounds has been satisfactory and will govern the engineand will hold the engine to 35 or 36 miles per hour without hunting orsurging.

As previously set forth, due to the dual operation on the spring fromthe position between Figs. 3 and 4, a smoother cam portion 36 may beutilized. This in effect means that there is less spring extensiondirectly due to the cam movement than would normally be the case,because part of the spring extension, as previously set forth, occursindirectly through the cam operation imposed on the follower and viceversa.

It will also be understood that when the spring is mounted as shown inFigs. 2, 3 and 4, that is the upper hole 48, the governor is verysensitive. When the intermediate hole 43 is utilized, the governoroperation is less sensitive and naturally when the end hole 48 isutilized for mounting the spring 33, the governor operation is even lesssensitive. The aforesaid, therefore, permits a range of adjustment todetermine the sensitiveness of governor operation.

Reference now will be had to Figs. 2, 3 and 4, wherein it is observedthat the axis of the shaft 43 carried by member 4| is normally slightlybelow the axis of the valve shaft 23. This difference in elevation, asit were, is approximately The member 4 I, as shown in Figs. 2 to 4,inclusive, has its pivotal axis determined by the shaft 33 slightly tothe right of the axis of the shaft 43 when the valve 25 is in wide openposition. It may, however, with the valve in wide open position, havethese two axes in vertical alignment, as it were.

Reference now will be had to Figs. 5 and 6 wherein a modified form ofthe invention is illustrated. Herein the valve is indicated by thenumeral 69, the valve shaft by the numeral 6|, the flattened portionthereof by the numeral 62, the cam by the numeral 63 with thecomplementary aperture 34 for rigid mounting upon the valve shaft. Thecam 63 has the positive tail portion 65 apertured as at 66 for mountingone end 6! of the coil spring 68. The numeral 63 indicates theconcentric portion of the cam face while the numeral 10 indicates theeccentric extension thereof; similar to the portion 36 of the cam shownin Figs. 2, 3 and 4. Portion 33 may be said to be of scroll character.

The numeral 1| indicates the shaft comparable to the shaft 38. A sleeve12 mounted thereon spaces the two members 73 the proper distance apart.These two members 13 are of angle or L- shape and the horizontal armportions 74 mount the shaft 15 upon which is pivoted a lever 76.Positioned between the two members 73 and at the knee portion Tl thereofis the shaft "58 surrounded by the anti-friction balls 19 upon which ismounted the cam roller 88 that contacts the cam member 63. This shaft 78also serves to secure the two members 13 in spaced relation.

The lever member 15 is apertured at 8| to receive the other end 82 ofthe spring 68. The other end 83 of the lever member 15 is apertured asat 84. A screw bolt 85 has its head portion 86 bearing on the externalface of said upper portion 83 of the lever 76 and its body portionextends through the aperture 84. This body portion of the screw hasthreaded connection with a the screw bolt.

of pivotal movement thereof, members being pivotally mounted adjacentthe portionswould not I porting nut 31 that is seated in slots 88 in themembers 13, as shown. Interposed between the n utand the member 16 atthe upper portionSB thereof and concentric with the threaded screw 85 isthe coil spring "90.

'It will be-quite apparent that spring '68 normally tends to draw theportion 16 toward the cam 53. However, the portion 83 of the member "Itis restrained from clockwise rotative movement on the shaft by the headportion 85 of Movement counterclockwise of this member upon the pin 15is prevented by the concentric spring 99. The position of the member16-8-3 is determined by the screw'S-Eand thus 'the initial tensionapplied to the spring 38 is ad- J'usted.

It also will be observed that when adjusted,

the entire L-shaped arrangement including the cam follower roller istiltable as a unit about the shaft H incident to tilting of the cam 53in the resulting velocity responsive movement of the valve 58. Theoperation of this form of the invention is exactly the same as thatpreviously described for the form shown in Figs. 1 to 4, inelusive.

While the invention has been illustrated and described in great detailin the drawings and foregoing description, the same is to be consideredas illustrative and not restrictive in charactor.

The several modifications described herein as well as others which willreadily suggest themselves topersons skilled in this art, all areconsidered to be within the broad scope-of the invention, referencebeing had to the appended claims.

The invention claimed is:

1. A spring resistance device comprising a relatively stationarysupport, a pair of spaced members, each independently pivoted on thesupport, one of said members responding to a variable force to beresisted, the force increment progressively increasing for successiveincrements the other of said first mentioned member, the pivotal axesbeing substantially parallel, a cam portion on one t ember, a followerportion on the other of said members, which follower portion is arrangedfor cam portion engagement, the said other member when unconstrainedhaving a position such that the I engage each other, and a tensionspring connected at opposite ends to the "members and constraining theportions into en gagement and constituting the sole tension connectiontherebetween, said cam portion in the pivoting of its supporting membereffecting'pivoting of the follower portion supporting member andarranged for stretching of the spring from one end only and for aportion of the pivotal movement and simultaneously stretching of thespring from opposite ends for another portion of the pivotal movementwherein the spring supportions of said members separate.

2. A spring resistance device comprising a relatively stationarysupport, a pair of spaced members, each independently pivoted on thesupport, one of said members responding to a variable force to beresisted, the force increment progressively increasing for successiveincrements of pivotal movement thereof, the other of said members beingpivotally mounted adjacent the first mentioned member, the pivotal axesbeing substantially parallel, a cam portion on one'member, a followerportion on the other of said members, which follower portion is arrangedfor cam portion engagement, the said other member when unconstrainedhaving a position such that the portions would notengage each other, anda tension spring connected at opposite ends to the members andconstraining the portions into engagement and constituting the soletension connection therebetween, said cam portion in the pivoting of itssupporting member efiecting pivoting of the follower portion supportingmember and simultaneously stretching of the spring from opposite ends.

3. .A spring device, as defined by claim 1, wherein the last twomentioned portions of pivotal movement are substantially equal.

4. A spring device, as defined by claim 1, wherein the cam and followerportions have continuing engagement for the full range of pivotalmovement of the first mentioned member, the cam portion being such thatsecond mentioned member pivotal movement does not occur untilsubstantially half the range of first mentioned member pivotalmovementhas been effected, simultaneous stretching of the spring from oppositeends'being correspondingly delayed.

5. A spring resistance device comprising a pair of independently pivotedmembers, one of said members responding to a variable force to beresisted, the other of said members being pivotally mounted adjacent thefirst mentioned member, a cam portion on one member, a follower portionon the other of said members, which follower portion is arranged for camengagement,-the said other member when unconstrained having a positionsuch that the portions would not'engage each other, and a tension springconnectedat opposite ends to-the members and constraining the portionsinto engagement and constituting the sole tension connectiontherebetween, saidcam portion in the pivoting of its supporting membereifecting pivoting of the follower portion supporting member andarranged knees thereof, the said follower portion including a roller forcontact with the cam portion, positioned between the spaced portions,antifriction means between the roller and the connection, another memberpivoted between an adjacent pair of ends of said L-shaped portions andhaving a tail portion to which one end of the said spring is connected,and means interposed between the tail including member and the saidspaced portions for adjusting'the force of the spring.

'6. A spring resistance device comprising a pair 'of independentlypivoted members, one of said members responding to a variable force tobe resisted, the other of said members being pivotally-mounted adjacentthe first mentioned member, a cam portion on one member, a followerportion on the other of said members, which follower portion is arrangedfor cam engagement, the said other member when unconstrained having aposition such that the portions would not engage each other, and atension spring con nected at opposite ends to the members andconstraining the portions into engagement and constituting the soletension connection therebetween, said cam portion in the pivoting of itssupporting member effecting pivoting of the follower portion supportingmember and arranged for stretching of the spring from one end only andfor a portion of the pivotal movement, and simultaneously stretching ofthe spring from opposite ends for another portion of the pivotalmovement wherein the spring supporting portions of said membersseparate, the said other member comprising a pair of L-shaped spacedportions, a connection between the same at the knees thereof, the saidfollower portion including a roller for contact with the cam portion,positioned between the spaced portions, anti-friction means between theroller and the connection, another member pivoted between an adjacentpair of ends of said L-shaped portions and having a tail portion towhich one end of the said spring is connected, and-means interposedbetween the tail including member and the said spaced portions foradjusting the force of the spring, the said last mentioned interposedmeans including a threaded member having operative threaded connectionwith the said L-shaped spaced portions, and a head stop for tail memberengagement.

7. A spring resistance device comprising a pair of independently pivotedmembers, one of said members responding to a variable force to beresisted, the other of said members being pivotally mounted adjacent thefirst mentioned member, a cam portion on one member, a follower portionon the other of said members, which follower portion is arranged for camengagement, the said other member when unconstrained having a positionsuch that the portions would not engage each other, and a tension springconnected at opposite ends to the members and constraining the portionsinto engagement and constituting the sole tension connectiontherebetween, said cam portion in the pivoting of its supporting membereffecting pivoting of the follower portion supporting member andarranged for stretching of the spring from one end only and for aportion of the pivotal movement, and

simultaneously stretching of the spring from opposite ends for anotherportion of the pivotal movement wherein the spring supporting portionsof said members separate, the said other member comprising a pair ofL-shaped spaced portions, a connection between the same at the kneesthereof, the said follower portion including a roller for contact withthe cam portion, positioned between the spaced portions, anti-frictionmeans between the roller and the connection, an-

other member pivoted between an adjacent pair of ends of said L-shapedportions and having a tail portion to which one end of the said springis connected, and means interposed between the tail including member andthe said spaced portions for adjusting the force of the spring, the saidlast mentioned interposed means including a threaded member havingoperative threaded connection with the said L-shaped spaced portions,and a head stop for tail member engagement, and yielding means normallyconstraining the tail member into head stop engagement in addition tothe spring effect thereon.

8. A spring device, as defined by claim 1, wherein each member includesa tail for connection to the adjacent end of said spring, one of saidmember tails being pivoted upon that member, and means for adjustingthat pivoted tail upon that member for spring initial force adjustment.

9. A spring resistance device comprising a pair of independently pivotedmembers, one of said members responding to a variable force to beresisted, the other of said members being pivotally mounted adjacent thefirst mentioned member, a cam portion on one member, a follower portionon the other of said members, which follower portion is arranged for camengagement, the said other member when unconstrained having a positionsuch that the portions would not engage each other, and a tension springconnected at opposite ends to the members and constraining the portionsinto engagement and constituting the sole tension connectiontherebetween, said cam portion in the pivoting of its supporting membereffecting pivoting of the follower portion supporting member andarranged for stretching of the spring from one end only and for aportion of the pivotal movement, and simultaneously stretching of thespring from opposite ends for another portion of the pivotal movementwherein the spring supporting portions of said members separate, eachmember including a tail for connection to the adjacent end of saidspring, one of said member tails being pivoted upon that member, andmeans for adjusting that pivoted tail upon that member for springinitial force adjustment, the said member comprising a pair of L-shapedspaced portions and a connection between the same at the knees thereof,the said pivoted tail being pivoted between adjacent ends of the saidL-shaped portions and the said follower portion including a roller forcontact with the cam portion and positioned between L-shaped portions atthe said connection.

10. A spring resistance device comprising a pair of' independentlypivoted members, one of said members responding to a variable force tobe resisted, the other of said members being pivotally mounted adjacentthe first mentioned member, a cam portion on one member, a followerportion on the other of said members, which follower portion is arrangedfor cam engagement, the said other member when unconstrained having aposition such that the portions would not engage each other, and atension spring connected at opposite ends to the members andconstraining the portions into engagement and constituting the soletension connection therebetween, said cam portion in the pivoting of itssupporting member effecting pivoting of the follower portion supportingmember and arranged for stretching of the spring from one end only andfor a portion of the pivotal movement, and simultaneously stretching ofthe spring from opposite ends for another portion of the pivotalmovement wherein the spring supporting portions of said membersseparate, each member including a tail for connection to the adjacentend of said spring, one of said member tails being pivoted upon thatmember, and means for adjusting that pivoted tail upon that member forspring initial force adjustment, the said member comprising a pair ofL-shaped spaced portions and a connection between the same at the kneesthereof, the said pivoted tail being pivoted between adjacent ends ofthe said L-shaped portions and the said follower portion including aroller for contact with the cam portion and positioned between L-shapedportions at the said connection, and anti-friction means interposedbetween and pivotally supporting the roller upon the said connection.

11. A spring device, as defined by claim 1,

wherein each member includes a tail for connection to the adjacent endof said spring, one of said member tails being pivoted upon that member,and means for adjusting that pivoted tail upon that member for springinitial force adjustment, the last mentioned adjusting means including athreaded member having operative threaded engagement with the pivotedtail supporting member and a head stop for pivoted tail engagement.

12. A spring device, as defined by claim 1, wherein each member includesa tail for connection to the adjacent end of said spring, one of saidmember tails being pivoted upon that member, and means for adjustingthat pivoted tail upon that member for spring initial force adjustment,the last mentioned adjusting means including a threaded member havingoperative threaded engagement with the pivoted tail supporting memberand a head stop for pivoted tail engagement, and yielding meansconcentric with the threaded member for maintaining pivoted tail andhead stop engagement and cushioning purposes.

13. A spring resistance device comprising a pair of independentlypivoted members, one of said members responding to a variable force tobe resisted, the other of said members being pivotally mounted adjacentthe first mentioned mem-' ber, a cam portion on one member, a followerportion on the other of said members, which follower portion is arrangedfor cam engagement, the said other member when unconstrained having aposition such that the portions would not engage each other, and atension spring connected at opposite ends to the members andconstraining the portions into engagement and constituting the soletension connection therebetween, said cam portion in the pivoting of itssupporting member effecting pivoting of the follower portion supportingmember and arranged for stretching of the spring from one end only andfor a portion of the pivotal movement, and

10 simultaneously stretching of the spring from opposite ends foranother portion of the pivotal movement wherein the spring supportingportions of said members separate, the said other member comprising apair of L-shaped spaced portions, a connection between the same at theknees thereof, the said follower portion including a roller for contactwith the cam portion, positioned between the spaced portions,antifriction means between the roller and the connection, another memberpivoted between an adjacent pair of ends of said L-shaped portions andhaving a tail portion to which one end of the said spring is connected,and means interposed between the tail including member and the saidspaced portions for'adjusting the force of the spring, the said lastmentioned interposed meansincluding a threaded member having operativethreaded connection with the said L-shaped spaced portions, and a headstop for tail member engagement, the operative threaded connectionincluding a nut, the said spaced portions having confronting nutreceiving seats, the nut being seated therein and the threaded memberextending between the spaced portions and into the nut.

RAYMOND REGER.

REFERENQES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 2,127,521 Kemp Aug. 31, 19382,024,296 Larsen Dec. 1'7, 1935 1,820,384 Essex Aug. 25, 1931 2,204,187Ostler June 11, 1940 2,155,195 Kirchhof Apr. 18, 1939 2,161,334Carwardine June 6, 1939 2,167,508 Herold July 25, 1939 2,330,482 FageolSept. 28, 1943

